Saurfang looks like he is leaving the Horde after being mocked and berated by Sylvannas . Jaina is off the reservation. So we see Saurfang, Khadgar, Magni , Thrall and possibly some of the new allied races band together and form a 3rd faction. Players have wanted it for years .
So maybe this expansion is leading up to a Old Gods showdown but the main theme of BfA is the formation of a third faction made up with the new allied races and some old familiar faces?
Possible?